71286156 has 30 divisors (see below), whose sum is σ = 186356940. Its totient is φ = 23761944.

The previous prime is 71286133. The next prime is 71286199. The reversal of 71286156 is 65168217.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71286156.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 109686 + ... + 110333.

It is an arithmetic number, because the mean of its divisors is an integer number (6211898).

Almost surely, 2^71286156 is an apocalyptic number.

It is an amenable number.

71286156 is an abundant number, since it is smaller than the sum of its proper divisors (115070784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71286156 is a wasteful number, since it uses less digits than its factorization.

71286156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220035 (or 220024 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 71286156 is about 8443.1129330360. The cubic root of 71286156 is about 414.6373296426.

It can be divided in two parts, 712 and 86156, that added together give a palindrome (86868).

The spelling of 71286156 in words is "seventy-one million, two hundred eighty-six thousand, one hundred fifty-six".